President Obama unleashed an unprecedented assault on Donald Trump in a press conference today, declaring that "the Republican nominee is unfit to serve as president." While Obama has sounded off on the subject before, he has never gone to the lengths he did here.

The president cited Trump's attacks on the Khan family, whose Muslim-American son died in battle in Iraq, and his "lack of basic knowledge around critical issues" as evidence that Trump is "woefully unprepared to do this job."